— The groundwater quality in the Lilou Coal Mine in Shandong Province can be divided into "three zones" based on the range of mining-induced fractures. Considering the observed Ordovician aquifer water level decline rate of 2.6 m/year, we propose that the saline mine water contained in Zones II and III can be injected into the well-developed …

Groundwater chemical composition can be changed due to long-term coal mining activities, but it was unclear how it was induced in Taiyuan Formation limestone (TFL) regarding the lack of relevant quantitative studies. The aim of this research is to improve understanding of the chemical composition ch …

 — Fenglin karst (pronounced funglin and translating as 'peak forest') has isolated hills rising from a plain, which is normally formed of limestone with a thin cover of alluvium. Slope angles and individual profiles of the hills are again irrelevant. The best-known fenglin is that with vertical-sided towers rising from the alluvial plains, so the …

 — 1. Introduction. Mining is necessary for the production of energy and materials that drive the world's economy (Hund et al., 2013).One major consequence of mining is biodiversity loss (Sonter et al., 2018) and land degradation, particularly in tropical regions (Sonter et al., 2017), where mining for coal, limestone, precious metals, and rare-earth …

 — Coal mine water inrush threatens mining operations, pollutes the environment, and wastes significant water resources [17], [18]. The Yanzhou mining area is a typical North China-Type coalfield. Lower coal mining is chiefly menaced by the Benxi Formation aquifer and Ordovician high-confined water [19]. This type of water inrush is …

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 — Countries like China, the USA, Russia, Japan, India, ... Limestone mining and various other anthropogenic activities in the neighbouring areas were found destroying the habitats of these plants ...

 — The mining depth of the North China type coal mine has reached nearly 1000 m, and the activity of radium and radon in deep groundwater is significantly high due to mining (Yi et al., 2019). In response to global climate change, China proposes carbon emission reduction. ... The results show that the limestone water is in a state of receiving ...

 — The mining depth of the North China type coal mine has reached nearly 1000 m, and the activity of radium and radon in deep groundwater is significantly ... When groundwater reaches area B, Ordovician limestone water supplies the largest proportion of b4, reaching 27.3 %; Carboniferous limestone water accounts for the largest proportion …

 — A limestone mining area in Beihai City, Guangxi Province, China, has faced severe water inrush problems during the mining process (Fig. 1), which have greatly reduced the mining efficiency. The mine has two main water gushing points, one of which is presented in Fig. 1a. The hydrochemical analysis results of the water gushing point are …

 — A sequence of limestone, thousands of metres thick and almost unbroken from the Devonian to the Triassic, forms the world's largest and most spectacular karst terrain largely within the southern …

 — The karst mountain region in Southwest China frequently experiences massive geo-disasters due to its geology and ongoing human engineering activities. As such, studies on the prevention and control of such disasters are urgently required. Using geological field surveys, a block discrete element method (UDEC) simulation, and …

Limestone is an essential mineral commodity of national importance. Some of the many prod-ucts made using limestone are shown in this photograph—breakfast cereal, paint, …

 — In this study, a post-mine limestone quarry located in the town of Fengshan, Guangxi Province, southwestern China. The quarry is 134 m high and has an open-pit area of 10,340 m 2. It dips at 75°–80° in the direction 275°–295°. ... Many abandoned limestone mines in China are located in urban residential areas. These mines were mined by ...

 — Tongluoshan mine park, located in Chongqing's Yubei district, was once the largest limestone mining area in the district. Soaked by minerals, its ponds gradually took on stunning colors of emerald and …

 — The most widely adopted method of limestone mining is through opencast pits with bench formation. Limestone mining causes widespread disturbance in the environment. Myriad impacts are...

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 — Mine safety has always been a serious issue in China because of the potential inrush of groundwater at the working face or tunnel face during the mining of deep coal seams (Chen et al. 2016; Gui et al. 2017; Wu et al. 2014; Yin et al. 2019; Zhang 2005). A typical limestone aquifer in the north China coalfield, called the Carboniferous …

Keywords Eastern China coal mine areas · Saline coal mine water (SCMW) · Ordovician aquifer recharge · In situ mine water injection · Hydrodynamic eld evolution ... the total mine water quantity) and limestone aquifers below the coal oor (accounting for 30% of the total mine water quantity). A 2D conceptual geological tectonic model is

506 Mine Water and the Environment (2022) 41:504–517 1 3 is 167.35 m thick with dominant components of medium-ne sandstone and magmatic rock and minor mudstone and sandy mudstone layers. The CLA, with an average thickness of 140 m, contains limestone, mudstone, ne sandstone, and thin coal seams; limestone accounts for most …

 — in the limestone mining area of Beihai City, Guangxi. Province, ... Li GY, Zhou WF (1999) Sinkholes in karst mining areas in China and . some methods of prevention. Eng Geol 52(1–2):45–50.

 — The Ordovician aquifer is a typical limestone aquifer associated with Pangzhuang coal mine in North China. The groundwater properties in this area have been investigated, as the aquifer is a major drinking-water source for local people. The hydro-chemical type of the water is Ca-Na-HCO3. The bicarbonate concentration (290–428 …

China. With fewer quarries the average haul distance will increase, and limestone prices will likely increase once more. Some Issues in Limestone Mining. Limestone is most often mined from a quarry. However, underground limestone . mines are found at places in the central and eastern United States, especially in and near cities.

 — These studies target different types of mining areas, such as marble mining areas, coal mining areas, and Sareke copper mine, but few have examined limestone mines. Most of the mining areas in Qingzhou, Shandong Province, China, are open-pit limestone mines, which are critical to regional economic development; however, their …

Limestone Mine, Emei City, Sichuan Province, China (Fig. 1a). The landslide volume was about 250,000 m 3. The original mining bench was seriously dam-aged, and the mine road was driven by the landslide, resulting in a wide range of tensile-shear damage (Fig. 1b, c), which seriously threatened the safety of

 — Statistical analysis was used to study the hydrogeochemical evolution of an Ordovician limestone aquifer group in the Hancheng mining area. Before mining, the groundwater flowed from northwest to southeast, the water type was primarily SO4–HCO3, and was mainly controlled by the tectonic structure and the specific hydrogeological …

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 — In the coal mining area, on the one hand, the large-scale drainage of groundwater is required due to the exploitation of coal seams; on the other hand, a large amount of water is needed for mine production and mining-area life [1,2,3].At the Guqiao Coal Mine in Huainan City, Anhui Province, China, extensive groundwater extraction has …

 — The degree of water-rock interaction affecting the accurate identification of mine water inrush source. • The cation exchange controls the formation of low Ca 2+ (Mg 2+), and high Na + (K +) mine water.. Eliminating the influence of cation exchange, Ordovician limestone, 14 th limestone, and water inrush samples have the same …

 — Limestone mining causes widespread disturbance in the environment. Myriad impacts are observed as changes in land use pattern, habitat loss, higher noise levels, dust emissions and changes in aquifer regimes. ... Countries like China, the USA, Russia, Japan, India, Brazil, Germany, Mexico and Italy are some of the world's largest …